Gmina Niwiska is a rural gmina (administrative district) in Kolbuszowa County, Subcarpathian Voivodeship, in south-eastern Poland. Its seat is the village of Niwiska, which lies approximately west of Kolbuszowa and north-west of the regional capital Rzeszów.
The gmina covers an area of , and its total population is 5,780.
Gmina Niwiska contains the villages and settlements of Hucina, Hucisko, Kosowy, Leszcze, Niwiska, Przyà ÂÃÂk, Siedlanka, Trzeà Âà  and Zapole.
Gmina Niwiska is bordered by the gminas of Cmolas, Kolbuszowa, Mielec, Ostrów, Przecà Âaw and SÃÂdziszów Maà Âopolski.
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